Bug ID 741345: Adaptive monitor gateway_icmp does not function correctly with two nodes

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Opened: Aug 22, 2018
Severity: 3-Major

Symptoms

An adaptive gateway-icmp monitor attached to two nodes, and configured with an even interval value (such as '2' or '4' seconds) may cause the node to be marked 'down' even when that node is available.

Impact

A node associated with the gateway-icmp monitor might be marked 'down', when it should be marked 'up'.

Conditions

-- An adaptive gateway-icmp monitor is applied to two nodes. -- The value configured is an even interval number (such as '2' or '4' seconds). -- The associated node is available.

Workaround

You can use either of the following workarounds: -- Configure an interval with an odd number of seconds (such as '3' or '5' seconds). -- Create a separate adaptive gateway-icmp monitor for each node.

Fix Information

None

Behavior Change